Table 1

Definition of neurodevelopmental impairment

Impairments	Severe neurodevelopmental impairment (any one or more of the following)*	Mild-moderate neurodevelopmental impairment (any one or more of the following)†	No neurodevelopmental impairment
Motor	CP with GMFCS 3, 4 or 5	CP with GMFCS 1 or 2	No cerebral palsy
Motor	Bayley III Motor Composite <70	Bayley III Motor Composite 70–84	Bayley III Motor Composite ≥85
Cognitive	Bayley III Cognitive Composite <70	Bayley III Cognitive Composite 70–84	Bayley III Cognitive Composite ≥85
Language	Bayley III Language Composite <70	Bayley III Language Composite 70–84	Bayley III Language Composite ≥85
Hearing	Hearing aid or cochlear implant	Sensorineural/mixed hearing loss without requirement for hearing devices	No hearing loss as per audiology report
Vision	Bilateral visual impairment	Unilateral visual impairment	No visual impairment as per ophthalmology report

*Includes children who could not be tested using the Bayley-III but who had a Bayley-III Adaptive Behaviour score <70 or who were assessed to have a significant developmental delay.
†Children who could not be tested using the Bayley-III but who had a Bayley-III Adaptive Behaviour score between 70 and 84.
CP, cerebral palsy; GMFCS, Gross Motor Function Classification System.